The problem of sludge has become a "serious problem" of sewage treatment plants.

With the increasingly strict environmental protection inspection, the downstream sludge disposal units often restrict the acceptance, resulting in no stable place for the sludge and can only "hold" in the biochemical system, which leads to a series of "secondary hazards", such as excessive effluent, reduced treated water volume, increased energy consumption, etc.

Therefore, during the "two sessions" this year, the environmental chamber of Commerce of the all China Federation of industry and Commerce submitted the "proposal on improving the inflow and sludge disposal of environmental protection industry", suggesting that the sludge disposal should be improved in many aspects.

Recently, the reply of the Ministry of ecological environment also came, giving four solutions, such as formulating policies, arranging investment in the central budget, improving the level of technological innovation and application, and strengthening supervision and inspection.

Overall, there has been progress. Although it did not fully meet the expectations of the industry, it has released some positive signals compared with the past, which is worthy of attention.